/ Dictionary / Index H hyperploid: Meaning and Definition of Find definitions for: hy•per•ploid Pronunciation: (hī'pur-ploid"), [key] — Biol. Biol. —adj. having a chromosome number that is greater than but not a multiple of the diploid number. —n. a hyperploid cell or organism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hyperplasia hyperpnea Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language